|
-� -California Regional 'alter Quality Control Board - �
<br /> Central Valley Region '
<br /> O 'on H Hickox Robert Schneider,ChairGray Davis
<br /> etarSacramento Main Office Governor
<br /> Environmental
<br /> Protection Internet Address http//www swrcb ca gov/rwgcb5 `' u " IVE
<br /> 3443 Routier Road,Suite A,Sacramento,California 95827-3003 3 .�
<br /> Phone(916)255-3000•FAX(916)255-3015
<br /> 29 October 2003
<br /> Mr Cecil Dillon -- Mr Richard Bakides- - - Mr Navtej Dhingsa
<br /> Flag City Ltd Partnership Boktdes Family Ltd Partnership First Investment Flag City, Inc
<br /> 1820 W Kettleman Lane, Suite E 6421 Capitol Avenue 517 Coronawood Lane
<br /> Lodi, CA 95242 Lodi, CA 95242 Carmichael, CA 95608
<br /> REVIEW WORK PLANADDEND VW, FAG CITY CHEVRON, 6421 CAPITOL AYENL'E, LORI,
<br /> SAN JQAQ UIN COUNTY, CLEANUP AND ABATEMENT ORDER (C&A) NO, 5-00-700
<br /> I reviewed the Work Plan Addendum, Cleanup and Abatement Order No 5-00-700 (Workplan), dated _
<br /> 17 October 2003, submitted on Chevron's behalf by Advanced GeoEnvironmental, Inc (AGE) The Workplan
<br /> proposes to investigate the source of the Methyl Tert-butyl Ether (MtBE) spikes in groundwater monitoring well
<br /> MW-8A The Workplan states analysis of MW-8A, screened 40 to 50 feet below ground surface (bgs)in a
<br /> medium sand, reported MtBE from March 2002 (700 pg/L) through September 2003 (290 Ag/L) Prior to March
<br /> 2002, seven quarters of groundwater analysis of MW-8A did not detect MtBE (<0 5 g /L) Groundwater
<br /> analysis of deeper aquifer zones, at MW-8B (95-105 feet bgs) and MW-8C (130-150 feet bgs), have not detected
<br /> MtBE The Workplan proposes drilling five additional soil borings and collect discreet grab groundwater
<br /> samples at 20, 30, 40, and 50 feet bgs Four of the soil borings are located onsite around MW-8A, and one boring
<br /> is located offsite on Banner Avenue Depth to water is 10 feet
<br /> I concur with the Workplan with the following conditions Figure 3, the cross-section, shows that two clay/fine
<br /> sand contacts occur at 12 feet and 22 feet bgs Please take grab grounawater samples in the zones with higher
<br /> porosity (sands), or provide the rationale why talang grab groundwater samples in the clay intervals would be
<br /> useful in the investigation Include a grab groundwater sample in the sand at the water table (approximately
<br /> 12 feet bgs) If there is field evidence of groundwater contamination at the Banner Avenue boring location,
<br /> install a monitoring well per prior approved workplan(s)
<br /> Please apply for required permits from San Joaquin County Environmental Health Department(SJCEHD) and
<br /> provide at least 72 hours prior notice, so that SJCEHD and I may be present for the fieldwork. You may contact
<br /> me at(916) 255-3115 with any questions or comments
<br /> ames L Barton, RG
<br /> Engineering Geologist
<br /> cc Mr Mark Owens, UST Cleanup Fund, SWRCB, Sacramento
<br /> Mr Mike Infurna, San Joaquin County Environmental Health Division, Stockton
<br /> Mr Timothy J Cuellar, Advanced GeoEnvironmental,Incorporated, Stockton
<br /> Mr Scott Rishwain,Rishwain& Rishwain, Stockton
<br /> Mr Ben Guzman, San Joaquin County Municipal Utilities, Stockton
<br /> California Environmental Protection Agency
<br /> Q0 Recycled Paper
<br /> The energy challenge facing California is real Every Californian needs to take immediate action to reduce energy consumption
<br /> For a list of simple ways you can reduce demand and cut your energy costs,see our Web-sate at hap//www swrcb ca govhwgcb5
<br />
|